The Alert List includes 32 species that
have been reported from the Blackfoot River counties of Missoula and Powell
or their nine immediately surrounding counties, and ratings of potential
to become significant weeds in six environmental types.

High - the species has high potential
to become an important weed in this environment within the Blackfoot River
drainage.

Possible - initial indications are
that the species could become a weed of this environment, but current information
is limited for specific conditions within the Blackfoot drainage.
Further analysis may be warranted.

Limited - the species is not expected
to affect extensive areas of the Blackfoot drainage in the near future,
but could become a localized weed under certain conditions

Uncertain - current information is
inadequate to assess risk. Further analysis may be warranted.

* An asterisk following the common name indicates
species which grow primarily as annuals

Note: The "more info" column has
the following links: - brief text
summaries for each species - distribution
data (executes a query on the INVADERS Database) - a list of related
links on the web - a list of related
links with pictures on the web

Alert List for Recently Invading
or Less Well Known Weeds and Risk Ratings for Blackfoot Drainage Environments